Water-heater.



No. 873,630. PATENTED DEC. 10, 1907.

J. STOTT.

WATER HEATER.

APPLIOATION FILED JUIzY2.1907.

4 SHEETS-SHEET 2.

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25 Jrwqed 62-02???" No. 873,630. I PATE NTED DEC. 10, 1907.

J. STOTT.

WATER HEATER.

APPLIOATION FILED JULY 2. 1901,

4 SHEETS-SHEET 3.'

THE uaRRls PETERS co., wAsumcrou, n. c.

PATENTED DEC. 10, 1907.

STOTT.

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. zw'zzwaas THE NORRIS PETERS co., wasmnamu, n. C

JAMES STOTT, OF OLDHAM, ENGLAND.

WATER-HEATER.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed July 2 1907. Serial No. 381.870.

T 0 all whom "it may concern:

Be it known that JAMES SToTT, a subject of the King of Great Britain, residing at Vernon Works, Lee street, Oldham, Lancashire, England, has invented certain new and useful 1m rovements in ater-Heaters, of which the f0 lowing is a specification.

This invention relates to apparatus for the instantaneous production of hot or boiling Water through the medium of steam, or it may be gas, and is specially applicable for providing boiling water for tea and coffee making, the object being to operate automatically by the displacement power of the water, a valve for regulating the supply of cold water to the apparatus, thereby keep-' ing the water at practically one constant degree of temperature.

My invention will be understood from the following description aided by the accompanying drawings in which:

Figure 1. is a front sectional elevation of a water heater, to which I prefer my invention to be applied. Fig. 2. is a side sectional elevation of such apparatus with one form of my invention applied. Fig. 3. is a side elevation of the apparatus with a modified form of regulator applied. Fig. 4. is a similar view to Fig. 3, and showing another construction of regulator.

The apparatus is provided with a cold water supply 1 and a steam service 2 connected with valves 3, 4, respectively, which are made to work at one operation by means of an engagement stop 5 attached to the steam valve lever 6, whereby the two levers 6 and 7 are brought over together. The water, when its valve 3 is opened by the lever, flows downward through a tube 8, and the steam likewise through its tube 9. The flow of Water continues down the tube in a steam chamber 10 to the bottom portion and into a box or chamber 11, from where it reverses its course and passes upwards through tubes 12, the steam meanwhile having filled the steam chamber 10. The number of these tubes 12 is so determined as to be considerably greater in total area than that of the first or downflow tube 8, whereby the flow of the water upwards is very much reduced in velocity. This reduction in the speed of the flowing water causes it to remain a longer time under the influence of the steam, until by the time the water reaches the tube header 13 at the top of the tubes, boiling point has been attained, immediately upon which pressure is created. The water then passes from the header up a large tube 14 (which may be terminated at any portion below the Water line instead of above as shown) an i flows over the top of same into a bell or float 15, and underneath same into an expansion box 16, the water finally flowing oil by a tube 17 outside, and into a spout 18, where it is duly drawn off.

The bell or float 15 is provided with a rod 19 connected to a lever 20 of a regulating tap 21 in the cold water supply 1, and the pres sure generated in the process of the continual boiling of the water lifts the bell 15 and' operates the tap, and so increases the supply of water to regulate the degree of temperature of the Water and any surplus steam may be liberated at the top of the bell 15 into the expansion box 16 or head, by means of a light rising and falling lid or cover 22 positioned on the bell 15, and perforated with holes or slots 23 to the requisite extent. This lid or cover 22 is loose fitting, in order to offer immediate relief when the pressure within the bell or hollow float is considerably greater than that required to float it. The automatic action of the float enables the apparatus to meet the variable conditions which are set upby a varying steam pressure or a varying cold water pressure. Without this regulating device, control of the boiling water is entirely by the two hand levers 6, 7, the cold water valve 3 being set in the usual way to a certain pressure by the clutch a1.- rangement 24 attached to each lever and to suit the pressure of steam. If the steam pressure happens to drop to any appreciable degree, the apparatus would fail to give boiling water without either adjusting the Water supply or the steam. Furthermore, in case v no variation of pressure took place, a certain quantity of water would be Wasted in the interval between pulling forward the levers 6, 7, and the boiling point being attained; the regulating valve enables the water supply to be closed off to a mere trickle, or if need be, it can act as a stop valve, as it will be understood that after the apparatus 18 once put into use, the water left as residuum in the tubes within the casing would set up the necessary pressure upon reaching boiling poilriit to turn on the Water supply automatica y.

In practice, the regulating tap 21 is adjusted so that when the bell 15 in the expansion box 16 falls to the stop position, a mere trickle of water goes forward to the tubes 12 in the steam chamber 10, when the hand levers 6 and 7 are operated. This regulating device, allows of the apparatus meeting the varying conditions brought about by a fluctuating pressure. If the water pressure should drop, there is more vigorous boiling, a greater expansion of steam occurs, and the bell 15 in the expansion box 16 rises to a higher point, thereby turning on the tap 21 and supplying more water. If the pressure of water increases, the boiling is less vigorous, and the lid 22 remains at a lower level. On the other hand, the action is just the same with a varying steam pressure. A higher steam pressure brings about more vigorous boiling, and the valve opens further, permitting the passage of a greater volume of water, while a reduction in the steam pressure is met by the bell 15 not lifting so high. In order to deal with the water which forms the residuum in the upflow tubes, the port of the steam valve is allowed to come open first, upon which vaporization of the residuum instantly takes place and passes into the expansion box and cover.

A condensed steam outlet 25 to trap or drain is provided at the lower part of the chamber 10.

26 is a compensating arm fitted to the valve rod 20 and provided with an adjustable weight 27 and lock nut 28, so that the bell 15 can operate the valve 21 eflectually without having to lift a dead weight.

What I claim and desire to secure by Letters Patent is:

1. In a water heating apparatus, the combination with a receptacle, a boiler, and an upright pipe leading from the latter and into the receptacle, of a hollow float mounted ceptacle inclosing the discharge end of the water pipe and having a hot water outlet therein arranged above the bottom thereof, a hollow float arranged within the receptacle and surrounding a discharge end of the water pipe, a valve operatively connected to the float and source of water supply for controlling the flow of water to the boiler, and means for relieving abnormal pressure within the float.-

3. In a water heater, the combination with a boiler, and a pipe for conducting water to and from the latter, of a hot water receptacle inclosing the discharge end of the pipe and having an outlet above the bottom thereof, a hollow float inclosed within the receptacle and surrounding the discharge end of the hot water pipe, a valve operatively connected to the float for controlling the supply of water to the boiler, and a valve fitted in the upper end of the float and operable by an abnormal pressure therein.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ERNOLD SIMPSON MosELnY, MALooLw SMETHURST. 

